Mexico: Light-duty: Fuel Economy and GHG

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1 Overview

  • Standard type: CO2 emissions limits and the fuel economy equivalent
  • Regulating bodies: Ministry of the Environment and Natural Resources (SEMARNAT), Ministry of Energy (SENER), and Ministry of the Economy (Economia)
  • Current standard: NOM-163-SEMARNAT-ENER-SCFI-2013
  • Applicability: New motor vehicles for sale in Mexico, up to a GVWR of 3,857 kg (8,500 lbs.).

2 History

In mid-2012, the Government of Mexico proposed a set of standards (PROY-NOM-163-SEMARNAT-ENER-SCFI-2012) to regulate CO2 emissions and fuel economy for new passenger vehicles (cars, pickup trucks, and SUVs). The proposal was patterned on US National Highway Transportation Safety Administration (NHTSA) 2012–2016 standards, although overall stringency was reduced and additional credits were granted, as described below.

The proposed standards were adopted in July, 2013, as NOM-163: NORMA Oficial Mexicana de Emisiones de bióxido de carbono (CO2) provenientes del escape y su equivalencia en términos de rendimiento de combustible, which sets formal standards for CO2 emission and equivalent fuel economy for new passenger vehicles, including cars, pickup trucks, and SUVs.

3 Technical Standards

The new standards apply to all manufacturers that sell new light-duty vehicles with gross vehicle weights (GVWs) up to 3,857 kg (8,500 lbs) with the exception of those manufacturers that sell less than 500 total vehicles per model year.

The standards regulate CO2 emissions in grams per kilometer, providing the equivalent regulatory metrics for fuel economy in km/l. The standard uses similar footprint or size-based curves as included in the U.S. and Canada regulations, providing goals for model years 2012 through 2016, and automakers must submit data for each model year. The standards require automakers to meet a sales-weighted average for model years 2014 through 2016, and allow use of credits generated in 2012 and 2013 to be used towards compliance. Manufacturers may also pool compliance for additional flexibility.

Separate compliance curves, based on the vehicle footprint (defined as the area between the four wheels of the vehicle in m2), are provided for two categories—passenger cars and light trucks (SUVs, minivans, pickups). The standards are based upon the U.S. NHTSA Corporate Average Fuel Economy (CAFE) curves, with a 1% reduction in the goal for cars and a 2% reduction for light trucks. In the absence of credits or trading, the resulting regulatory curves would lead to a fleet average fuel economy for 2016 of 14.9 km/l, if average vehicle size and car/truck ratios remain constant. Application of additional credits reduce the 2016 fleet average goal to 14.6 km/l, not accounting for application of early action credits or credit banking.

Emissions targets for each model year are reflected in the table below; CO2 targets for each model-year vehicle are calculated according to their respective vehicle-classification footprint.

Passenger Vehicle Emissions Targets (CO2 g/km)
Model Year
Vehicle footprint ≤ 3.81m2 Vehicle footprint ≥ 5.20m2 Vehicle footprint > 3.81m2 and < 5.20m2 *
2012 155.1 199.5 31.8616
2013 151.5 196.0 31.8671
2014 147.7 192.1 31.8428
2015 142.1 186.5 31.8570
2016 135.7 180.1 31.8662

*units expressed as CO2 [g/km]/[m2]

PV Emissions Mex final.jpg

Light-duty Truck Emissions Targets (CO2 g/km)
Model Year
Vehicle footprint ≤ 3.81m2 Vehicle footprint ≥ 6.13m2 Vehicle footprint > 3.81m2 and < 6.13m2*
2012 188.9 252.9 27.5681
2013 183.6 247.7 27.5713
2014 179.5 243.5 27.5622
2015 172.1 236.1 27.5620
2016 163.6 227.6 27.5647

*units expressed as CO2 [g/km]/[m2]

LDT Emissions Mex final.jpg

3.1 Credits

The standards include credits for introduction of highly efficient technologies, efficient and low climate impact air conditioning systems, and advanced vehicle technologies, and early action.

  1. Introduction of highly efficient technologies. Credits are available to automakers that offer or produce hybrid, plug-in hybrid or electric vehicles within Mexico, or vehicles that have CO2 emissions 20% lower than the goals for that vehicle size, type and model year. There is no minimum number of vehicles sold in Mexico to get this credit and the full credit is provided with demonstration of compliance.
  2. Air conditioning systems. Credits are available for manufacturers that demonstrate plans to introduce air conditioning systems that reduce CO2-equivalent emissions (either through low-leak systems of substitution of refrigerants with lower global warming potential gases) and use more efficient technologies for air conditioning systems. Credits are applied in full for any fleet in which at least 80% of the vehicles sold equipped with such systems.
  3. Technology penetration. Credits are available for manufacturers that demonstrate plans to introduce any listed technology (such as gasoline direct injection, variable valve timing continuously variable transmissions, etc.) or other accepted or recognized technology (by EPA or similar authorities in the EU or Japan) to reduce fuel consumption. Credits are applied in full for any fleetin which at least 80% of the vehicles sold equipped with such technologies.
  4. Early action. Credits are provided for automaker compliance with emission targets for the years 2012 and 2013. Credits for compliance in these years are equal to 1.5 times the fleet average for the two years combined.

All credits can be banked and used towards compliance for model years 2014 through 2016, including credits accumulated in 2012 and 2013.

The following table provides credit values for MY 2013 through 2016 listed in NOM-163.

Model Year CO2 Emissions in grams/km (equivalent in km/l)
Introduction of highly efficient technologies Air-conditioning systems Technology penetration
2013 2.7 (.251) 1.4 (.131) 1.4 (.131)
2014 2.7 (.251) 1.4 (.131) 1.4 (.131)
2015 2.3 (.214) 1.1 (.103) 1.1 (.103)
2016 1.8 (.168) .9 (.085) .9 (.085)

4 Links

4.1 Regulatory Documents